The Web is awash in Ruby code that is now virtually impossible to change or extend. This text helps you solve that problem by using powerful real-world object-oriented design techniques, which it thoroughly explains using simple and practical Ruby examples. Sandi Metz has distilled a lifetime of conversations and presentations about object-oriented design into a set of Ruby-focused practices for crafting manageable, extensible, and pleasing code. She shows you how to build new applications that can survive success and repair existing applications that have become impossible to change. Each technique is illustrated with extended examples, all downloadable from the companion Web site, poodr.info. The first title to focus squarely on object-oriented Ruby application design, Practical Object-Oriented Design in Ruby will guide you to superior outcomes, whatever your previous Ruby experience. Novice Ruby programmers will find specific rules to live by; intermediate Ruby programmers will find valuable principles they can flexibly interpret and apply; and advanced Ruby programmers will find a common language they can use to lead development and guide their colleagues. This guide will help you Understand how object-oriented programming can help you craft Ruby code that is easier to maintain and upgrade Decide what belongs in a single Ruby class Avoid entangling objects that should be kept separate Define flexible interfaces among objects Reduce programming overhead costs with duck typing Successfully apply inheritance Build objects via composition Design cost-effective tests Solve common problems associated with poorly designed Ruby code

    

    Reflecting the increasing demand for efficient conversion and control of electrical power, it considers the latest power devices, circuits, and control schemes that continue to extend power electronics technology to new applications areas. Presents material methodically - first establishing the background theory before going on to specific applications. Familiarizes readers with the analysis and operation of various power conversions circuits that have applications at high power levels, and formulates equations that govern the behavior of these circuits. Discusses the application of power electronic devices in uncontrolled and controlled single phase rectifiers, inverters, ac voltage controllers, cycloconverters, and dc choppers, and demonstrates voltage and current waveform analysis for the output, starting with a simple resistive load to more practical inductive loads. Includes many worked examples, basic formulas, and an abundance of illustrations and diagrams.

    Her only worries are schoolwork, keeping up with her best friend and whether she should sleep with her boyfriend. Then her adoptive father disappears one winter's day. As she tries to find out why he left her, her past unravels in front of her.

    This involves taking detailed and technical product information and distilling it into key marketing and sales messages as well as working among several teams in an organization to plan and execute product releases and launches. This book is a must-have for anyone who works as, or with, a Product Marketing Manager. It not only explains the role but focuses on practical applications of the information presented and ties everything together with entertaining life lessons and anecdotes collected through years of experience by the author as well as interviews with his colleagues and other industry experts. If you are considering a career as a Product Marketing Manager, are new to the profession and looking for guidance and clarification, already have many years of experience in the role and are looking for new inspiration and ideas, or are interested in learning what a Product Marketing Manager colleague of yours is responsible for within your organization, this book is for you.

    As he did so masterfully in Prime Obsession, Derbyshire brings the evolution of mathematical thinking to dramatic life by focusing on the key historical players. Unknown Quantity begins in the time of Abraham and Isaac and moves from Abel's proof to the higher levels of abstraction developed by Galois through modern-day advances. Derbyshire explains how a simple turn of thought from this plus this equals this to this plus what equals this? gave birth to a whole new way of perceiving the world. With a historian's narrative authority and a beloved teacher's clarity and passion, Derbyshire leads readers on an intellectually satisfying and pleasantly challenging historical and mathematical journey.

    How Buildings Learn is a masterful new synthesis that proposes that buildings adapt best when constantly refined and reshaped by their occupants, and that architects can mature from being artists of space to becoming artists of time. From the connected farmhouses of New England to I.M. Pei's Media Lab, from "satisficing" to "form follows funding," from the evolution of bungalows to the invention of Santa Fe Style, from Low Road military surplus buildings to a High Road English classic like Chatsworth—this is a far-ranging survey of unexplored essential territory.More than any other human artifacts, buildings improve with time—if they're allowed to. How Buildings Learn shows how to work with time rather than against it.

    No other guide offers this. Includes over 130 interview questions and answers. Breaks down all interview questions into essential parts. Shows you why interviewers are asking you the question, what the interviewer wants to hear from you, how you should answer it, and then gives you several "real-life" examples of how to answer the question. Covers the STAR method. Includes several behavioral question and answer examples. Covers interview preparation tips. Covers phone interviews and how to prepare for them. Includes 35 questions to ask interviewers. And much more! This guide works for all job interviews. Management, IT, Director, VP, Teachers, Finance, Sales, Accounting, Engineering, Government, Hospitality, Human Resources, Manufacturing, Non-Profit, Administrative, Branding, Health Care, etc.

    And she's seen how a simple message of hope uplifts a life that's left in tatters.In these pages you'll find a daily dollop of Barbara's favorite jokes, heartwarming stories, witty cartoons, and heartache-survival strategies. Share a moment each morning with the Geranium Lady, and soon you, like Barbara, will realize you've been "blessed to be a blessing."

    Sara was a writer, and drinking seemed to be an element of the identity. As a writer, she searched for the story that would define who she was, and her drinking was a part of her. She drank socially at first, with friends or family, at parties, or festivals. She drank at home sometimes, a glass of wine or two. It was when the two glasses of wine turned into two bottles of wine, when her blacked-out drunken behavior began destroying her marriage, when she began combining her drinking with pills - prescribed or otherwise - this is when Sara began to realize she had a problem. It wasn't until she hit her last rock bottom that she understood her story. If she were to continue drinking, her marriage would be over. She knew she had to quit. So she did. Sara quickly learned that sobriety wasn't easy. She had never realized before what a focal point alcohol had been in her life. This new world she was in felt strange and unnatural. Sometimes the daily battle felt impossible. But inside the struggle she found words. One day, she threw on her husband's oversized Nike sweatshirt, drove her daughter to school, and came home to write. The words just poured out of her. Now she had a story. Despite the struggles she faced and still faces, Sara has remained sober. This is her story.

    Far from a dry, nuts-and-bolts exposition, however, 101 THINGS I LEARNED® IN ENGINEERING SCHOOL probes real-world examples to show how the engineer's way of thinking can-and sometimes cannot-inform our understanding of how things work. Questions from the simple to the profound are illuminated throughout: Why shouldn't soldiers march across a bridge? Why do buildings want to float and cars want to fly? What is the difference between thinking systemically and thinking systematically? How can engineering solutions sympathize with the natural environment? Presented in the familiar, illustrated format of the popular 101 THINGS I LEARNED® series, 101 THINGS I LEARNED® IN ENGINEERING SCHOOL offers an informative resource for students, general readers, and even experienced engineers, who will discover within many provocative new insights into familiar principles.

    We often overlook the historical link between mathematics and technological advances, says Stewart—but this connection is integral to any complete understanding of human history.Equations are modeled on the patterns we find in the world around us, says Stewart, and it is through equations that we are able to make sense of, and in turn influence, our world. Stewart locates the origins of each equation he presents—from Pythagoras's Theorem to Newton's Law of Gravity to Einstein's Theory of Relativity—within a particular historical moment, elucidating the development of mathematical and philosophical thought necessary for each equation's discovery. None of these equations emerged in a vacuum, Stewart shows; each drew, in some way, on past equations and the thinking of the day. In turn, all of these equations paved the way for major developments in mathematics, science, philosophy, and technology. Without logarithms (invented in the early 17th century by John Napier and improved by Henry Briggs), scientists would not have been able to calculate the movement of the planets, and mathematicians would not have been able to develop fractal geometry. The Wave Equation is one of the most important equations in physics, and is crucial for engineers studying the vibrations in vehicles and the response of buildings to earthquakes. And the equation at the heart of Information Theory, devised by Claude Shannon, is the basis of digital communication today.An approachable and informative guide to the equations upon which nearly every aspect of scientific and mathematical understanding depends, In Pursuit of the Unknown is also a reminder that equations have profoundly influenced our thinking and continue to make possible many of the advances that we take for granted.

    Despite its title, it's not wild ranting pseudo-science to be dismissed by those with brains. Rather, Amdahl maintains that one need not understand quantum physics to grasp how electricity works in practical applications. To understand your toaster or your fax machine, it doesn't really matter whether there are electrons or not, and it's a lot easier and more fun to start with the toaster than with quarks and calculus. The book is mildly weird, often funny, always clear and easy to understand. It assumes the reader doesn't know a volt from a hole in the ground and gently leads him or her through integrated circuits, radio, oscillators and the basics of the digital revolution using examples that include green buffalo, microscopic beer parties, break-dancing chickens and naked Norwegian girls in rowboats. OK, it's more than mildly weird.The book has been reprinted numerous times since 1991 and has achieved minor cult status. Reviewed and praised in dozens of electronics and educational magazines, it is used as a text by major corporations, colleges, high schools, military schools and trade schools. It has been studied by education programs at colleges across the United States. This book was making wise cracks in the corner before anyone thought of designing books for dummies and idiots; some say it helped to inspire that industry.It may be the only "introduction to electronics books" with back cover comments by Dave Barry, Ray Bradbury, Clive Cussler, and George Garrett, as well as recomendations from Robert Hazen, Bob Mostafapour, Dr. Roger Young, Dr. Wayne Green, Scott Rundle, Brian Battles, Michelle Guido, Herb Reichert and Emil Venere. As Monitoring Times said, "Perhaps the best electronics book ever. If you'd like to learn about basic electronics but haven't been able to pull it off, get There Are No Electrons. Just trust us. Get the book."

    In this collection of landmark mathematical works, editor Stephen Hawking has assembled the greatest feats humans have ever accomplished using just numbers and their brains.

     The role of the devil's advocate is nearly universal in business today. It allows individuals to step outside themselves and raise questions and concerns that effectively kill new projects and ideas, while claiming no personal responsibility. Nothing is more potent in stifling innovation. Drawing on nearly 20 years of experience managing IDEO, Kelley identifies ten roles people can play in an organization to foster innovation and new ideas while offering an effective counter to naysayers. Among these approaches are the Anthropologist—the person who goes into the field to see how customers use and respond to products, to come up with new innovations; the Cross-pollinator who mixes and matches ideas, people, and technology to create new ideas that can drive growth; and the Hurdler, who instantly looks for ways to overcome the limits and challenges to any situation. Filled with engaging stories of how companies like Kraft, Procter and Gamble, Cargill and Samsung have incorporated IDEO's thinking to transform the customer experience, THE TEN FACES OF INNOVATION is an extraordinary guide to nurturing and sustaining a culture of continuous innovation and renewal.